Mine-insulator.



P. A., WARREN. MINE INSULATOR. APPLICATION FILED JULY 24, 1911.

Patented July 9, 1912.

Witnesses W ventor Attorneys,

FREDERIG' A. WARREN, OF CANON CITY, COLORADO.

' MINE-fNsULA'roR.

Specification of Letters Patent.

Patented J 11ly9, 1912..

Application filedJ'uly 24, 1911. Serial No. 640,164.

To all whom it may concern: I

Be, it known that I, F BEDERIC A. WAR- 7 BEN, a citizen of the UnitedStates,'residing at Canon City, in the county of Fremont lowing is aspecification.

and State of Colorado, have invented a new and useful Mine-Insulator, ofwhich the fol- By way of explanation, I will state that in mines, andelsewhere, where falling debris is encountered, such falling. materialfrequently engages the wiring of the mine.- The wires are commonlyfastened rigidly to an insulator, and when the falling rock or othermaterialstrikes the wire, the wire is broken, the insulatoris torn down,or the wire is slid forcibly along the insulator, thereby stripping theinsulation from the One of the objects of the present invention is toprovide an insulator which will support a wire, without interfering withthe longitudinal movement ofthe wire, the construction being such that,when falling material strikes the wire, the same will yieldlongitudinally, there being upon the insulator, no element which closelyengages.

the wire, to prevent free longitudinal movement thereof.

A further object of the invention is to provide a novel form of base foran insulator, and to provide a novel form of wire holder therefor. I

A further object of the invention is to provide a base and a wireholder, having co-acting parts adapted to receive a tie wire,

the tie wire constituting at once, a means "for holdingthe constituentelements 'of the wire holder together, and a means for maintaining thewire holder, as an entirety, upon the base. r

A. further object of the invention is to provide an insulator which mayreadily be mounted upon supports of different configurations. I I

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed. and claimed, it being understood thatchanges in the preciseembodiment ofinvention herein disclosed can be made within the-scope ofwhat is'claimed without departin from the spirit of the invention. I

In t e accompanying drawings -Figure lshows the insulator in plan, partsbeing broken away; Fig. 2' is a section on the line A-B of Fig. 1; Fig.3 is a section on'the line CD of Fig. 1; Fig. 4 is a side elevationofone member of the wire-holder; Fig. 5 is an end view of the structureshown in Fig. 1;;Fig. 6 is a top plan of the structure shown in Fig. 4;and Fig. 7 is a fragmental section on the line E'F of Fig. 1.

The invention includes as a primary element, a base 1, the sameconsisting of a trough shaped, arcuate body 2, transversely corrugatedupon its inner face, as shown at 3. In the free edges of the body 2,adjacent the ends thereof, are transverse notches 4. In the outer face.of the body 2 are grooves 7, connecting the bases of the notches 4;.@utstanding from the edges of the arcuate body-2, are flaring wings 5,terminally provided with laterally extended feet 6. The outer faces of'the feet 6' are concaved in their intermediate portions as shown at 8,the extreme-end portions 9 of the feet lying 1n.a common plane, andbeing flat tened, as clearly appearing in Fig. 3. Since the feet 6 areconcaved as'shown at 8, the base 1 may be mounted upon a support havinga curved cross section, but since the ends of the feet are flattened, tolie in a common plane, as shown at 9, a fourpoint support for the base 1is provided, so that the base may rest securely upon a flat structure.Thus, the insulator may be assembled with a mine timber which is eithercircular or rectangular in cross section. The feet 6 are provided withopenings 6*, preferably tapered in form, and inclined toward thelongitudinal center ofthe insulator. The openings 6? are adapted toreceive securing elements 6", and when these elements '6 are in place,they will be inclined toward each other at their free ends, therebyaffording a secure hold upon the support with which the insulator is.assembled. I I

The arcuate body '2 of the base 1 is adapted to receive a wire holderwhich is denoted generally .by the numeral 10. This wire holderv 10 issomewhat longer than the base 1, and comprises a pair of trough-shapedsections 11. These sections 11. are superficially corrugated, as shownat 12, to engage with thecorrugations 3 of the body 20f the base. Theinterengagement of the corrugations 12 i and 3 prevents the wire holder10 as an entity, frommoving longi- I tudinally ofthe base 1, and, at'thesame time, the interengagement of these corrugations serves to alinecertain of the corrugations with the notches 4 and with the groove 7,the construction being such that when these parts are alined, a tie wire14 may be passed through the groove 7, through the notches 4 and throughone of the corrugations 12 of the wire holder 10, the sections 11 of thewire holder being thus 'held together, and thewire holder, as an entity,being thus held upon the body portion 2 of the base. Through the wireholder 10 extends a longitudinal opening 15, formed partly in one of thesections 11, and partly in the other of said sections. The opening 15flares adjacent its ends, as shown at 16, the flaring of the openingpermitting .the insulator to be used'upon curves, and likewisefacilitating the longitudinal sliding movement of the Wire in .theopening 15 without chafing the insulation of the wire.

The'sections 11 of the wire holder 10 are duplicates, and but one ofthem will be de: scribed. Each section 11, then, is fashioned withlongitudinal edges 17 and 18, inclined in opposite directions,longitudinally of the sections, the edges 17 and 18 lying inintersecting planes. radially disposed, as shown at 19. The edge 17 isgrooved for one-half of its length,

as shown at 20, a tongue .21 outstanding from the edge 17 throughout theother half of the length of said edge. The cross section of the tongue21 is the same as the cross section-of the groove 20,- tlieobvious endbeing to 'permit one sectlon 11, formed as above .described, to interfit'With another, similarly formed section. The inner, end of the tongue 21serves to define a shoulder '22 in one section, which, abutting againstthe similarly formed shoulder in another section, serves to, revent thesections from having longitudinal movement upon each other. When thetongue 21 of one section registers in the groove 20 of another section,the cooperation of these parts will prevent the sections from. movingtransversely uponeach other., As the edges 17 and 18 slope in oppositedirections, and lie in intersecting planes, the water finding its waybetween the sections will I travel longitudinally of theinsulator and bedischarged beyond the ends of the base 1.

'Referring to Fig. 2 it will be noted that when the feet'6 of the base 1are assembled 'with a support, the body 2 will be spaced apart from suchsupport, 'and thus the tie wire may be mounted in the. notches 4,without removing the'base' 1 from the support whereby it is carried.

It is to be noted that the conductor is not bound or held in theinsulator, but is free.

to slide longitudinally therein, the opening 1n the insulator beingflared, to permit this movement in the conductor. Therefore,

The edge 18 is fiat and is lating material wherewith the conductor issurrounded.

It is to be understood that the tie wire 14 is of relatively smalldiameter, compared with the diameter of the conductor which theinsulator carries. Therefore, the tie wire 14 will give away,before theconducting wire is injured, the yielding of the tie Wire 14 permitting aseparation of the members 11, and a consequent freeing of the conductor.However, it is to be noted that should the port-ions 11 of the devicebecome broken, the wire 14 remaining intact, the conducting wire will,nevertheless, be upheld.

Having thus described the invention, what is claimed is v 1. Aninsulator comprising a base and a wire holder mounted upon the base, thewire holder comprising freely separable parts; the base and the parts ofthe wire holder having alined grooves located in acommon plane andadapted to receivea tie.

2. An insulator comprising a base and a wire holder resting upon thebase, the wire holder comprising freely separable parts; the base andthe parts of the wire holder having alined grooves located in a commonplane; and a tiemounted in the grooves, the tie constituting at once ameans for holding the parts of the wire holder together, and a means formaintaining the wire holder upon the base.

3. An insulator comprising an arcuate body having oppositelydisposednotches in its edges, and a groove in its outer face, connectingthe bases of the notches; anda wire holder mounted in the body; thenotches and. the groove being adapted to receive a tie, whereby theholder is bound upon the a body.

4. An insulator comprising an arcuate body having oppositely disposednotches in its edges, and a groove in its outer face, connecting thebases of the notches; and a wire holder mounted in the body; the holderand the body having interengaging corrugations, adapted to allne one ofthe corrugations in the holder with the notches and with the groove, toreceive a tie.

5. As an article of manufacture, a troughshaped block for use in theconstruction of an insulator, the longitudinal edges of the block beinglocated in intersecting planes,

one of said ed es'being flat, the other of said Y edges beingongitudinally grooved for .a portion. of its length; and pr'ovidh raisedrib throughout the remainder of its length, the cross section of the ribcorrespondingto the cross section of the groove.

6. As an'article of manufacture, an insud with a lator base comprisingan arcuate body provided adjacent its edges with outstanding wings, andlateral feet at the extremities of the wings; the outer faces of thefeet being concaved at their intermediate portions and being flat attheir ends, and disposed in a common plane.

7. As an article of manufacture, an insu: lator base comprising anarcuate body provided along its edges with outstanding elements, theouter edges, of which are concaved, the ends of said elements lying in aas my own,

common plane; the body having transverse notches adjacent its edges,there being grooves in the outer face of the body, 0on necting the basesof oppositely disposed notches.

In testimony that I claim the foregoing I have hereto afiixed mysignature in the presence of two witnesses. FREDERIC A. WARREN.

Witnesses: Y

ALVAH S. HOBART, L. A. A'rwoon.

